def adsb_decode_all(n=None):
print("===== Decode ADS-B sample data=====")
import csv
f = open('tests/data/sample_data_adsb.csv', 'rt')
msg0 = None
msg1 = None
for i, r in enumerate(csv.reader(f)):
if n and i > n:
break
ts = r[0]
m = r[1]
icao = adsb.icao(m)
tc = adsb.typecode(m)
if 1 <= tc <= 4:
print(ts, m, icao, tc, adsb.category(m), adsb.callsign(m))
if tc == 19:
print(ts, m, icao, tc, adsb.velocity(m))
if 5 <= tc <= 18:
if adsb.oe_flag(m):
msg1 = m
t1 = ts
else:
msg0 = m
t0 = ts
if msg0 and msg1:
pos = adsb.position(msg0, msg1, t0, t1)
alt = adsb.altitude(m)
print(ts, m, icao, tc, pos, alt)
def adsb_decode_all(n=None):
print "===== Decode all ADS-B sample data====="
import csv
f = open('adsb.csv', 'rt')
msg0 = None
msg1 = None
for i, r in enumerate(csv.reader(f)):
if n and i > n:
break
ts = r[0]
m = r[1]
icao = adsb.icao(m)
tc = adsb.typecode(m)
if 1 <= tc <= 4:
print ts, m, icao, tc, adsb.category(m), adsb.callsign(m)
if tc == 19:
print ts, m, icao, tc, adsb.velocity(m)
if 5 <= tc <= 18:
if adsb.oe_flag(m):
msg1 = m
t1 = ts
else:
msg0 = m
t0 = ts
if msg0 and msg1:
pos = adsb.position(msg0, msg1, t0, t1)
alt = adsb.altitude(m)
print ts, m, icao, tc, pos, alt
def test_adsb_category():
assert adsb.category("8D406B902015A678D4D220AA4BDA") == 5
def test_adsb_category():
assert adsb.category("8D406B902015A678D4D220AA4BDA") == 0
def _parse(self, msg_ascii):
if not msg_ascii or msg_ascii[0] != '*':
raise ValueError
msg_hex = msg_ascii[1:].split(';', 1)[0]
try:
icao = adsb.icao(msg_hex).lower()
downlink_format = df(msg_hex)
type_code = adsb.typecode(msg_hex)
except:
raise ValueError
# version 0 is assumed, so populate it on initialisation
ac_data = self.positions.get(icao, {"version": 0})
if downlink_format == 17 or downlink_format == 18:
# An aircraft airborne position message has downlink format 17 (or 18) with
# type code from 9 to 18 (baro altitude) or 20 to 22 (GNSS altitude)
# ref https://mode-s.org/decode/adsb/airborne-position.html
if ac_data.get("version", None) == 1 and ac_data.get("nic_s", None):
ac_data["nic"] = adsb.nic_v1(msg_hex, ac_data["nic_s"])
if (type_code >= 1 and type_code <= 4):
# Slightly normalise the callsign - it's supposed to only be [0-9A-Z]
# with space padding. PyModeS uses _ padding, which I think is an older
# version of the spec.
ac_data["callsign"] = adsb.callsign(msg_hex).upper().replace("_", " ")[:8]
ac_data["emitter_category"] = adsb.category(msg_hex)
elif (type_code >= 9 and type_code <= 18) or (type_code >= 20 and type_code <= 22):
nuc_p = None
if ac_data.get("version", None) == 0:
# In ADSB version 0, the type code encodes the nuc_p (navigational
# uncertianty category - position) value via this magic lookup table
nuc_p_lookup = {
9: 9,
10: 8,
11: 7,
12: 6,
13: 5,
14: 4,
15: 3,
16: 2,
17: 1,
18: 0,
20: 9,
21: 8,
22: 0,
}
ac_data["nuc_p"] = nuc_p_lookup.get(type_code, None)
elif ac_data.get("version", None) == 2:
ac_data["nic_b"] = adsb.nic_b(msg_hex)
if ac_data.get("version", None) == 2 and "nic_a" in ac_data.keys() and "nic_c" in ac_data.keys():
nic_a = ac_data["nic_a"]
nic_c = ac_data["nic_c"]
ac_data["nic"] = adsb.nic_v2(msg_hex, nic_a, nic_c)
# Aircraft position
if not self.gps.is_fresh():
#print("aircraft: not updating {0} df={1} tc={2} as my GPS position is unknown ({3})".format(icao, downlink_format, type_code, msg_hex))
raise ValueError
# Use the known location of the receiver to calculate the aircraft position
# from one messsage
try:
my_latitude, my_longitude = self.gps.position()
except NoFixError:
# For testing
my_latitude, my_longitude = (51.519559, -0.114227)
# a rare race condition
#raise ValueError
ac_lat, ac_lon = adsb.position_with_ref(msg_hex, my_latitude, my_longitude)
#print("aircraft: update {0} df={1} tc={2} {3}, {4} ({5})".format(icao, downlink_format, type_code, ac_lat, ac_lon, msg_hex))
ac_data["lat"] = ac_lat
ac_data["lon"] = ac_lon
elif type_code == 19:
# From the docs: returns speed (kt) ground track or heading (degree),
# rate of climb/descent (ft/min), speed type (‘GS’ for ground speed,
# ‘AS’ for airspeed), direction source (‘true_north’ for ground track /
# true north as refrence, ‘mag_north’ for magnetic north as reference),
# rate of climb/descent source (‘Baro’ for barometer, ‘GNSS’ for GNSS
# constellation).
if ac_data.get("version", None) == 1 or ac_data.get("version", None) == 2:
ac_data["nac_v"] = adsb.nac_v(msg_hex)
try:
(speed, track, climb, speed_source, track_source, climb_source) = adsb.velocity(msg_hex, rtn_sources=True)
ac_data["speed_h"] = speed
ac_data["track"] = track
ac_data["speed_v"] = climb
ac_data["speed_h_source"] = speed_source
ac_data["track_source"] = track_source
ac_data["speed_v_source"] = climb_source
except TypeError:
# adsb.velocity can return None
raise ValueError
elif type_code == 31:
# Operational status
version = adsb.version(msg_hex)
nic_s = adsb.nic_s(msg_hex)
# v0 nuc_p is determined by type_code above
if version == 1:
try:
# Is this the right place for nucp? The docs say yes, but one error
# I've received says 8d3c5ee6f81300000039283c21cf: Not a surface
# position message (5<TC<8), airborne position message (8<TC<19),
# or airborne position with GNSS height (20<TC<22)
nuc_p = adsb.nuc_p(msg_hex)
nuc_v = adsb.nuc_v(msg_hex)
except RuntimeError as e:
print("aircraft: error parsing v1 NUC: {}".format(e))
raise ValueError
ac_data["nic_s"] = nic_s
ac_data["nuc_p"] = nuc_p
ac_data["nuc_v"] = nuc_v
ac_data["nac_p"] = adsb.nac_p(msg_hex)
ac_data["sil"] = adsb.sil(msg_hex, version)
elif version == 2:
ac_data["nac_p"] = adsb.nac_p(msg_hex)
(nic_a, nic_c) = adsb.nic_a_c(msg_hex)
ac_data["nic_a"] = nic_a
ac_data["nic_c"] = nic_c
ac_data["sil"] = adsb.sil(msg_hex, version)
ac_data["version"] = version
ac_data["nic_s"] = nic_s
else:
raise ValueError
elif downlink_format == 4 or downlink_format == 20:
altitude = adsb_common.altcode(msg_hex)
ac_data["altitude"] = altitude
else:
# unsupported message
raise ValueError
ac_data["updated"] = datetime.now()
self.positions[icao] = ac_data
